Package com.adobe.fontengine.font

Class Matrix

java.lang.Object
com.adobe.fontengine.font.Matrix
public final class Matrix extends Object
A 2x3 "Postscript style" coordinate matrix (a 2D transformation and shift).

Synchronization

These objects are immutable.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    final double
    a
     
    final double
    b
     
    final double
    c
     
    final double
    d
     
    static final Matrix
    IDENTITY_MATRIX
    a constant Matrix representing the identity transformation
    final double
    tx
     
    final double
    ty
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    Matrix(double[] matrix)
    Creates a matrix from either a 4 or 6 element array representing a matrix.
    Matrix(double a, double b, double c, double d, double tx, double ty)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    applyToPoint(Point p)
    computes p * this and returns the result in p
    double
    applyToXYGetX(double x, double y)
    computes [x y] * this and returns the resulting x value
    double
    applyToXYGetY(double x, double y)
    computes [x y] * this and returns the resulting y value
    boolean
    isIdentity()
    Returns true iff this is very close to representing the identity transformation.
    boolean
    isInverse(Matrix inverse)
    Checks whether 'inverse' is the inverse of this matrix.
    Matrix
    multiply(double multiplier)
    Computes this * multiplier and returns the resulting matrix.
    Matrix
    multiply(Matrix multiplier)
    Computes this * multiplier and returns the resulting matrix.

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • IDENTITY_MATRIX

      public static final Matrix IDENTITY_MATRIX
      a constant Matrix representing the identity transformation

    • a

      public final double a

    • b

      public final double b

    • c

      public final double c

    • d

      public final double d

    • tx

      public final double tx

    • ty

      public final double ty

  • Constructor Details

    • Matrix

      public Matrix(double[] matrix)
      Creates a matrix from either a 4 or 6 element array representing a matrix. If there are 4 elements, tx and ty are set to 0.
      Parameters:
      matrix - contains the matrix elements in the following order: a, b, c, d, tx, ty

    • Matrix

      public Matrix(double a, double b, double c, double d, double tx, double ty)

  • Method Details

    • isIdentity

      public boolean isIdentity()
      Returns true iff this is very close to representing the identity transformation.

    • isInverse

      public boolean isInverse(Matrix inverse)
      Checks whether 'inverse' is the inverse of this matrix.
      Parameters:
      inverse - the matrix to be compared
      Returns:
      true iff this * inverse ~= IDENTITY_MATRIX

    • multiply

      public Matrix multiply(Matrix multiplier)
      Computes this * multiplier and returns the resulting matrix.

    • multiply

      public Matrix multiply(double multiplier)
      Computes this * multiplier and returns the resulting matrix.

    • applyToPoint

      public void applyToPoint(Point p)
      computes p * this and returns the result in p

    • applyToXYGetX

      public double applyToXYGetX(double x, double y)
      computes [x y] * this and returns the resulting x value

    • applyToXYGetY

      public double applyToXYGetY(double x, double y)
      computes [x y] * this and returns the resulting y value